UK company Spaceflux has been contracted to develop and operate a ground-based SDA sensor as part of Project Nyx Alpha to monitor objects in GEO for UK Space Command. (Spaceflux)

The UK's Defence Science and Technology Laboratory (Dstl) is conducting three technology demonstrator programmes to explore the utility of novel space domain awareness (SDA) technologies.

The first programme is exploring the development of a Deep Space Radar (DSR) designed to monitor and protect geostationary orbit (GEO) assets such as the Skynet satellite communications system, William Feline, senior principal advisor for SDA at the UK Ministry of Defence (MoD), said at the Military Space Situational Awareness Conference 2024, held in London from 22 to 24 April.

The purpose of the programme is also to assess whether the UK needs its own DSR capability or whether it can rely on or complement the Deep Space Advanced Radar Capability (DARC) currently being developed alongside Australia and the US, Emma Kerr, senior principal engineer for SDA at Dstl told Janes .

A monostatic or biostatic system is being considered as well as whether a new or existing system is required, Feline said.

One of the first six Rafales to be delivered to Croatia. Deliveries of all 12 aircraft will be complete by mid-2025. (Dassault)

Croatia has inducted into service the Dassault Rafale combat aircraft it recently received from France.

The manufacturer announced the milestone on 25 April, saying the first six of 12 Rafales had been formally received into service by the Croatian Air Force (Hrvatsko ratno zrakoplovstvo i protuzračna obrana: HRZ i PZO).

Having been handed over to the Croatian Ministry of Defence (MoD) at the French Air and Space Force (Armée de l'Air et de l'Espace: AAE) base at Mont-de-Marsan in France in 2023, these initial aircraft were received into the 91 operational base near Zagreb in a ceremony that was attended by Croation Prime Minister Andrej Plenković and Minister of Defence Ivan Anušić.

With the Rafale to be operated by 191 Squadron, the first of the follow-on batch of six aircraft will arrive in Croatia by the end of 2024 to complete the unit by mid-2025.

For more information on the Croatian Air Force, please seeCroatia – Air Force .

A Brazilian Air Force UH-60L Black Hawk. The Brazilian Army is set to replace its HM-2 Black Hawk fleet with newer examples. (Leandro Maldonado)

The Brazilian Army is to acquire 12 Sikorsky UH-60M Black Hawk utility helicopters to replace its eight HM-3 Cougar and four HM-2 Black Hawk helicopters, said Army Commander General Tomás Miguel Miné Ribeiro Paiva during a 17 April presentation to the Brazilian Committee on Foreign Relations and National Defense.

Gen Tomás noted that the fleet is to be purchased through the US Foreign Military Sales (FMS) programme and entails purchasing surplus helicopters, which will be refurbished before transfer to the Brazilian Army Aviation Command (CAvEx).

The acquisition is being carried out as part of the Army Strategic Program Army Aviation (Prg EE Av Ex). The phasing out of the Cougar and Black Hawk helicopters was approved in December 2023.

The HM-3 is fielded by the 2nd Army Aviation Battalion and the 3rd Army Aviation Battalion, and the HM-2 is deployed by the 4th Army Aviation Battalion.